feat(admin): enhance editor UI (links, image captions) & fix categories

Added animated auto-opening link modal, custom image node with isolated caption deletion, fixed single-select category data binding, improved featured image layout, and updated README.

frontend/README.md

@@ -8,15 +8,16 @@ The **Pinar** font is installed and served locally. The application no longer re
 
 ## CMS, SEO & Editor Features
 
-The project includes a robust, custom-built Digital Twin (Admin Panel) with advanced content management capabilities:
+The project includes a robust, custom-built Digital Twin (Admin Panel) with advanced content management capabilities, emphasizing a premium UI/UX:
 
-*   **Advanced SEO Management:** Dynamic `meta_description` fields (150-160 characters) and fully managed Image `Alt` texts (with auto-fallback to titles/filenames) ensure high search engine visibility.
-*   **Tags & Categorization:** Integrated `react-select` for modern category selection and creatable dynamic tags.
-*   **Article Metadata UI:** A beautifully designed metadata component displaying the author's avatar, name, and publication date right below the H1 title.
+*   **Advanced SEO & Featured Media:** Dynamic `meta_description` fields (150-160 characters). The Featured Image component features a compact layout with smart data-binding: the `Alt` text auto-fills based on the title (e.g., `[Title] - تصویر شاخص`) as a smart fallback to ensure SEO compliance, while still allowing **full manual overrides** for precise custom keyword targeting.
+*   **Precise Category Management:** A flawlessly integrated, single-select category dropdown using `react-select` (Creatable) and `react-hook-form`. It allows creating new categories on the fly while retaining them in the global list, seamlessly matching the strict single-category backend schema.
+*   **Article Metadata & Reading Time:** A beautifully designed metadata component displaying the author's avatar, name, publication date, and an auto-calculated dynamic reading time (displayed dynamically with Persian numerals, e.g., "۵ دقیقه مطالعه") directly below the H1 title.
 *   **Dynamic Table of Contents (TOC):** Auto-generates a clickable TOC from `h2` and `h3` tags within the article, using a custom Persian-supported `slugify` logic for anchor links.
 *   **Custom Tiptap WYSIWYG Editor:** 
-    *   Specific block-level toggling for Headings (H1: 18px, H2: 16px, H3: 14px) and Paragraphs (14px).
-    *   A custom feature to wrap English text blocks in LTR styling (`<span dir="ltr" class="english-text">` at 12px) for perfect bi-directional text alignment.
+    *   **Fixed Toolbar & Typography:** Dedicated LTR/RTL toggles (`data-dir="ltr|rtl"`) with specific font scaling (RTL Base: 14px, LTR Base: 12px) mapped to a fixed toolbar that maintains layout stability.
+    *   **Advanced Image & Caption Nodes:** Built via `ReactNodeViewRenderer`, rendering HTML wrapped in `<figure><figcaption>`. Features strictly isolated UI deletion controls (separate 'X' buttons to delete either the image entirely or just the caption text).
+    *   **Animated Link Modal:** A premium, auto-opening modal with smooth fade/scale transition effects. Includes seamless checkbox toggles for "Open in new tab" (`target="_blank" rel="noopener noreferrer"`) and SEO link attributes (`nofollow/dofollow`).
 *   **Full Jalali (Shamsi) Calendar Integration:** 
     *   Admin panel utilizes `react-multi-date-picker` for a visual Persian date selection experience.
     *   Frontend and text displays rely on native `Intl.DateTimeFormat` to render dates and numerals perfectly in Persian.
@@ -50,4 +51,3 @@ npm run build
 * `src/seo.ts` — Manages page-level SEO tags (Title, Description, Open Graph, Canonical, JSON-LD).
 * `src/data/site.ts` — Shared TypeScript data models and interfaces.
 
-